Built in the 12th century as a fortress and a hospital for Benedictine monks, the Castellaccio di Monreale is located on top of Monte Caputo. The castle has a rectangular layout with some irregularities and seven protruding towers on the outside. In 1393 it was home to King Martin I and soon after it was abandoned. In 1897 the monument was sold by the Municipality of Monreale to the Club Alpino Siciliano which agreed to restructure and maintain it. After restoration by the Club Alpino Siciliano, Castellaccio was reopened to the public in 1906, becoming one of the club’s alpine stations and is currently a favourite hiking destination of the area.